The term 'connected to central computer system' can be summarized by the crossword solution 'online, ' which is a six-letter word. Online refers to any device or service that is connected to the internet, allowing it to communicate with other devices and services connected to the same network. This connection allows for the exchange of data, information, and resources between computers and other devices. In the context of a central computer system, online connections allow for the sharing of data and resources between multiple computers and devices.